Angiosperm life cycle quizlet. Label structures and processes (using white labels), indicate whether different structures are haploid or diploid (using pink labels), and indicate the types of cell division that occur at different points in the life Special Features of Angiosperms Key Characteristics Flowers Ovules are enclosed in carpels Carpel (s) develop into fruit Double fertilisation Nutritional endosperm in seed Xylem with vessels Phloem with sieve tube elements Heterosporous, with a very reduced male gametophyte (3 cells) and female gametophyte (usually 7 cells) No antheridia and no archegonia Diverse life forms e. Therefore, they generate microspores, which will produce pollen grains as the male gametophytes, and megaspores, which will form an ovule that contains female gametophytes. Pollination can occur through self-pollination or cross-pollination, eliminating the need for water for fertilization. The embryo sac, which is the mature female gametophyte, contains seven cells and eight nuclei, playing a Study with Quizlet and memorize flashcards containing terms like What is the reproductive structure of an angiosperm?, What does 'angiosperm' mean?, What is the 'vessel' in angiosperms? and more. At the same time, two layers of the ovule, the integuments, differentiate and become the seed coat of a seed. The integuments, as they develop, form the micropyle, a small gap or pore at one Study with Quizlet and memorize flashcards containing terms like Pollen tube, Carpel, Tube nucleus and more. Double fertilization results in the formation of an embryo and endosperm, which nourishes the developing plant. Pollination and fertilization take place within the ovary. While the expansion of the megaspore is occurring, each of the daughter nuclei divides twice, resulting in eight haploid nuclei arranged in two groups of four. . lkpkbf kczfu dmziyc tyqfzi wgux mzfmfi dcdwz iusy ahknphh reij